package com.hmall.filters;
import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.util.MultiValueMap;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Order(-1)
@Component
public class AuthorizeFilter implements GatewayFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        // 1.获取请求参数
        MultiValueMap<String, String> params = exchange.getRequest().getQueryParams();
       // 2 获取 authorization 参数
        String auth = params.getFirst("authorization");
        //3 校验
        if ("admin".equals(auth)){
         //放行
          return chain.filter(exchange);
        }
        // 4.拦截
        // 4.1.禁止访问，设置状态码
          exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
        return exchange.getResponse().setComplete();
    }
}
